Voltage - Output 3:	--
Base Part Number:	PT7749
Size / Dimension:	--
Package / Case:	27-SIP Module, Vertical
Mounting Type:	Through Hole, Vertical
Efficiency:	--
Operating Temperature:	--
Features:	--
Applications:	ITE (Commercial)
Current - Output (Max):	18A
Series:	PT7740
Voltage - Output 2:	--
Voltage - Output 1:	1.3 ~ 3.5 V
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	3V
Number of Outputs:	1
Type:	Non-Isolated PoL Module
Part Status:	Obsolete
Packaging:	Tray

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DC DC Converters

DC/DC converters are used to convert direct current (DC) from one voltage level to another and are found in many power electronics applications. The PT7749N is a synchronous DC/DC converter from Power-One. It is a high-efficiency converter designed specifically for high current applications.

Application fields

The PT7749N is especially well suited for distributed power architectures, solar panel systems, and transportation systems. It can also be used in various consumer applications such as PCs, digital cameras, and set-top boxes. It is also used in various industrial applications such as industrial automation and instrumentation systems.

Working principle

The PT7749N converts an input voltage to a desired output voltage with the help of two power stages - a boost pre-regulator stage and a buck post-regulator stage. The boost pre-regulator stage consists of an inductor and a high-side MOSFET switch. The inductor charges up the input voltage and the MOSFET switch opens and closes to regulate the output voltage. The buck post-regulator stage uses an N-channel MOSFET Switch to regulate the output voltage. The PT7749N uses synchronous rectification, which results in higher efficiency levels than traditional rectification methods. The converter can be configured to operate in either a Constant Voltage Mode (CVM) or a Constant Current Mode (CCM) to address various applications. The CVM mode is used when a constant voltage output is required, while the CCM mode is used when a constant current output is required. The PT7749N features built-in current-sharing and parallel operation capabilities that allow it to be used in multiple-output power architectures. It also has built-in protections such as overcurrent, overvoltage, undervoltage, and overtemperature protection that protect the converter from external damages.

Conclusion

The PT7749N is a high-efficiency synchronous DC/DC converter from Power-One. It is well suited for distributed power architectures, solar panel systems, and transportation systems, as well as various consumer and industrial applications. It features a boost pre-regulator stage and a buck post-regulator stage, along with synchronous rectification and current-sharing and parallel operation capabilities. It also provides various protections to guard against external damages.

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